摘要
采用推出试验分析和有限元模拟结合的方法,通过试验测试和有限元参数分析,研究栓钉受剪加载全过程和焊缝形态对栓钉抗剪承载力的影响。研究结果表明:试件的破坏模式为栓钉断裂,断裂前试件经历了显著的弹性和塑性变化过程;焊缝对栓钉的抗剪承载力有显著提高,试验测试值为公路桥梁现行设计标准规定计算值的1.59倍;采用角焊缝围焊的栓钉,当焊缝尺寸控制在合理范围内时,栓钉的抗剪承载力随焊缝高度线性增大;采用瓷环成形的栓钉,焊缝高度h与直径D的比值不宜大于0.42,在此限值范围内,栓钉抗剪承载力随焊缝高度和直径线性增大;有限元模拟时需考虑焊缝形态的影响,否则会降低栓钉的抗剪承载力。
This paper investigated the whole shear loading process and the influence of weld shapes on the shear bearing capacity of stud by push-out tests and finite element parameter studies.The results showed that the failure mode of specimen was the fracture of stud.The specimen had experienced a significant elastic and plastic process before fracture.The shear bearing capacity of the stud was significantly improved by weld seam,and the test value was 1.59 times of the value calculated by design code.When the weld size was controlled within a reasonable range,the shear bearing capacity increased linearly with the weld height for studs with fillet weld.The ratio of weld height h to diameter D was recommended smaller than 0.42 for studs formed by porcelain ring.Within this limit,the shear bearing capacity of stud increased linearly with the weld height and diameter.The weld shape should be considered in finite element simulations,otherwise the shear bearing capacity of studs would be reduced.
作者
王潇碧
宋瑞年
占玉林
赵人达
WANG Xiaobi;SONG Ruinian;ZHAN Yulin;ZHAO Renda(Jincheng College,Sichuan University,Chengdu 611731,China;Sichuan Highway Planning,Survey,Design and Research Institute Ltd.,Chengdu 610031,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)
出处
《工业建筑》
CSCD
北大核心
2020年第12期144-149,185,共7页
Industrial Construction
基金
国家自然科学基金项目(51878564)
四川省科技计划项目(2017GZ0369)
四川省交通运输科技项目(2016B2-1-2)。
关键词
组合结构
栓钉
抗剪承载力
焊缝形态
推出试验
composite structures
stud
shear bearing capacity
weld shape
push-out test
